We should start a discussion about conventions fo Data Layers and GAv2 could be the catalyst for such discussions.
I also repared a demo website with GAv2 deployed for various use cases (Internal Search, Login, Lead Forms, E-commerce, Wizards and Interactions) and I'd like to get more feedback if having such website of your own (thanks to downloading it with customized title and GTM Account ID and hosting it e.g. via Github Pages) would be helpful for you to start experimenting with the new Data Model and ways to use the new tool.
Also I am looking for feedback on what is already implemented there - if the proposed format of the Data Layer messages makes sense and is a good example for using as a reference implementation in your own projects.
Presentation for MeasureCamp London 2019 by @cataLuc